The final episode of this moving series tonight sees Nicky Campbell meeting foster carers Sean and Danielle, who are looking after a baby with a genetic disorder that affects his hearing. Social workers take the boy's details to an adoption exchange day, where single mum-of-three Clair thinks he would be an ideal match. Meanwhile, Edinburgh couple Grant and Diane had expected to start a family when Diane's sister offered to be a surrogate mother - but then tragedy struck. They're now hoping to become parents to siblings, but will they be approved by the panel?